Python学习笔记-SQLSERVER

pip install pymssql

class C_SQLServer(object):
    def __init__(self, Server,user,password,database):
        self.Server=Server
        self.user=user
        self.password=password
        self.database=database
    #执行无返回操作，适用与(insert,update,delete)
    def execute_non_query(self,SQLStr):
        conn = _mssql.connect(server=self.Server, user=self.user, password=self.password, database=self.database,charset='utf8')
        conn.execute_non_query(SQLStr)
    #执行返回迭代器的操作，迭代器中的行以字典方式展示，适用于(select)
    def execute_query(self,SQLStr):
        conn = _mssql.connect(server=self.Server, user=self.user, password=self.password, database=self.database,charset='utf8')
        conn.execute_query(SQLStr)
        return conn
    #执行返回单行的字典
    def execute_row(self,SQLStr):
        conn = _mssql.connect(server=self.Server, user=self.user, password=self.password, database=self.database,charset='utf8')
        row=conn.execute_row(SQLStr)
        return row
    #执行返回单值的操作，适用于返回行计数等
    def execute_scalar(self,SQLStr):
        conn = _mssql.connect(server=self.Server, user=self.user, password=self.password, database=self.database,charset='utf8')
        scalar=conn.execute_scalar(SQLStr)
        return scalar
    #获取标题，以及标题类型字典
    def MSSQL_GetTitleDict(self,conn):
        titleDict={}
        for rows in conn.get_header():
            titleDict[rows[0]]=rows[1]
　　　　  #如果调用conn完成后千万记得，要吧连接关闭。
　　　　　conn.close()
        return titleDict

cursor.executemany(
    "INSERT INTO persons VALUES (%d, %s, %s)",
    [(1, 'John Smith', 'John Doe'),
     (2, 'Jane Doe', 'Joe Dog'),
     (3, 'Mike T.', 'Sarah H.')])
# you must call commit() to persist your data if you don't set autocommit to True
conn.commit()

    def GetTableTitle(self,tableName):
        SQLStr=f"select * from {tableName}"
        conn=self.execute_query(f"select * from {tableName}")
        titleDict=self.MSSQL_GetTitleDict(conn)
        return titleDict

  #拼接字符串 Insert ————Select————UNION ALL————SELECT类型插入
    def InsertByRow(self,tableName,TitleList,DataList):
        #获取列头的字典包含列名以及数据类型
        titleDict=self.GetTableTitle(tableName)
        #定义Insert语句的头部
        insertTitleStr=f"Insert into {tableName} (" + ','.join(TitleList)+")\n"
        #批导入变量，执行行号
        i=0
        #按行执行
        for row_dict in DataList:
            insertRowStrList=[]
            #循环列
            for columnName in TitleList:
                columnType=titleDict[columnName]
                if columnType in [1,4]:
                    isChar=1
                else:
                    isChar=0
                columValue= row_dict[columnName]
                #SqlParameter_AddQuotes函数用以增给值增加单引号
                columValue=SqlParameter_AddQuotes(isChar,columValue)
                queryStr=columnName+"="+columValue
                insertRowStrList.append(queryStr)
            #行的SelectStr
            insertRowStr=','.join(insertRowStrList)
            if i==0:
                insertStr="Select "+insertRowStr
            else:
                insertStr+="\n union all \nSelect "+insertRowStr
            i+=1
            #定义批量插入的大小，这里是300行为一批Insert
            if i%300==0:
                self.execute_non_query(insertTitleStr+'\n'+insertStr)
                i=0
        #剩余数据Insert
        self.execute_non_query(insertTitleStr+'\n'+insertStr)